431111028 has 12 divisors (see below), whose sum is σ = 1005925760. Its totient is φ = 143703672.

The previous prime is 431110987. The next prime is 431111033. The reversal of 431111028 is 820111134.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 431110995 and 431111013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17962948 + ... + 17962971.

Almost surely, 2^431111028 is an apocalyptic number.

It is an amenable number.

431111028 is an abundant number, since it is smaller than the sum of its proper divisors (574814732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431111028 is a wasteful number, since it uses less digits than its factorization.

431111028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35925926 (or 35925924 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 431111028 is about 20763.2133351271. The cubic root of 431111028 is about 755.4337393415.

The spelling of 431111028 in words is "four hundred thirty-one million, one hundred eleven thousand, twenty-eight".